Check valve



Nov. 4, 1947. I I M. KATCHER CHECK VALVE Filed Nov. 10, 1945 ATTORN EYPatented Nov. 4, 1947 UNITED I1 ICE iEHECK "MorrisiKatcher,NewiiorhflJX.Application November 10, l 943gfserialfNo$fill9$i5 This inventionrelates to a check valve, especially one which is suitable for use in afuel pump for internal combustion engines. In pumps of this type, it hasbeen a practice to use valves which can be pushed in with a forced fitinto the passages of the pump. The principal part of valves of this typeis made of a sheet metal stamping of a rather complicated form. Theassembling of the parts of the valve also offers difficulties. Valves ofthis type can be seen at 41 and 49 in Fig. 1 of Patent No. 2,036,452. Itis an object of the present invention to construct a valve in which thetwo principal parts are formed from simple sheet metal stampings,namely, a trough-shaped ring and a cage which can be given a forced fitin the ring. The outside surface of the ring is substantiallycylindrical, so that it can be readily given a forced fit in thecircular passages of a fuel pump.

Other objects and advantages will become ap-' parent upon further studyof the description and drawing, in which:

Fig. 1 is a substantially median vertical section through a fuel pumpshowing two of my valves set therein;

Fig. 2 is a plan view of the inlet side of the valve with a portionbroken away to show the side of the plate beneath;

Fig. 3 is a section taken along the line 3-3 of Fig. 2;

Fig. 4 is a plan view of the outlet side of the valve, and

Fig. 5 is a section taken similarly to Fig. 3 of a modified form of thevalve.

Near the end of inlet nipple B of the fuel pump is set one of my valves,valve 1, with a forced fit therein, the ring 8 of the valve being pushedagainst shoulder 9. Inlet nipple 6 leads to a chamber H! in which ismounted diaphragm |l. Outlet nipple |2 leads the fuel from chamber H].In outlet nipple I2 is set another of my valves, valve l3, which has amounting similar to that of valve 1. Valve 1 permits the fuel to enterchamber I but not to pass out to the left therefrom. Valve |3 permitsthe fuel to leave chamber ID and to enter nipple l2 but not to return.Diaphragm II is held between washers M which are attached to the upperend of rod Ill. The lower end of rod l has a slot IS in which one end ofcrank l1 plays. Crank I1 is fixed at its other end to rock shaft l8,said shaft being rocked by mechanism not shown but which is well knownto the art wherein fuel pumps are used. The reciprocation of crankcauses rod l5 to flex diaphragm H up and down effecting the intake offuel through valve I and its discharge through valve I3.

Valve 1 consists of a ring or crown 8 of relatively heavy gauge metal.Ring 8 is substantially trough-shaped in cross section. A retainer cageIQ of relatively lighter gauge metal has a cylindrical upper portion 20which is given a forced fit with the inside of the outer rim'2l of ring8, Fig. 3. The inside surface of rim 2| is substantially cylindrical.Arms 26 extend upward from a substantially flat base 22 to join thelatter with the cylindrical upper portion 20. A spring 23 is set uponbase 22 and at its upper end presses or seats a polygonal plate 25against the bottom edge of inner rim 24 of ring 8. Parts 8, l9 and 25are readily stamped from sheet metal and easily assembled with spring23. In its broader sense base 22 is merely a transversely extendingportion of cage l9 not necessarily fiat or imperforate.

In Fig. 5 is shown a valve of modified construction. It comprises arelatively heavy gauge ring 3| of sheet metal of trough-shaped crosssection, the trough being of V-form, the outer rim 2! of which insteadof having a cylindrical inner surface as with ring 8 of Fig. 3, has asubstantially truncated conical one. Cage 28 has a flat base 29 asbefore, with arms 30 extending upward therefrom. The inner rim 32 ofring 3| has its outer surface also of substantially truncated conicalform but with a flatter conical angle. Upper portion 33 of cage 28before it was forced into ring 3| was inscribable in a cylinder as shownfor the upper cylindrical portion 20 of Fig. 3. As cage 28 is forcedinto ring 3|, the top of portion 33 first strikes the upper part of theouter surface of inner rim 32 and then is spread outward to engage theinner surface of outer rim 21. Spring 23 and plate 25 are similar inconstruction and function to those shown in Figs. 3 and 4.

In operation, liquid entering the valve passes inward through rings 8 or3| and pushes down plate 25 away from the ring against the pressure ofspring 23. Once this is done the liquid passes by the edge of plate 25and through the spaces between the arms of cages IE! or 2B. When fluidenters the valve in the reverse direction, plate 25 is pushed againstring 8 in the valve of Fig. 3 and against ring 3| in the valve of Fig.5, in both cases blocking the flow of fluid through the valve.

I claim:

A check valve comprising a ring, trough-shaped in cross section, saidtrough being substantially V-shaped providing an inner and an outer rimextending axially of said ring, a cage having a substantiallytransversely extending base and a portion extending generally axiallyfrom the base to the ring, said rims extending with their free edgestoward the base, the inside surface of the outer rim being in the formof a truncated cone with its largest diameter away from the free edge ofsaid latter rim, the outside surface of the inner rim also being in theform of a truncated cone but at a greater inclination with the axis ofthe ring than said inside surface, said cage portion extending into thering with a tight fit with the entire inside surface of the outer rim ofthe ring, a transversely extending member movable within the cage toseat against the free edge of the inner rim of the ring, and a springbetween the member and said base, normal holding the member in seatedposition against 7 said inner rim.

MORRIS KATCHER.

4 REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,251,758 Dayton Jan. 1, 19182,027,137 Yeomans Jan. 7, 1936 1,998,444 Clapp Apr. 23, 1935 1,654,474Wolter Dec. 27, 1927 1,872,928 Giiford Aug. 23, 1932 2,320,697 BinderJune 1, 1943 484,843 Bavier Oct. 25, 1892 517,914 Bavier Apr. 10, 18942,241,758 Baldine May 13, 1941 1,413,371 Adler Apr. 18, 1922 FOREIGNPATENTS Number Country Date 341,761 Italy I935

